円形レイヤクラスタ
<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context="com.mapbox.mapboxandroiddemo.examples.dds.CircleLayerClusteringActivity"> <com.mapbox.mapboxsdk.maps.MapViewandroid:id="@+id/mapView"android:layout_width="match_parent"android:layout_height="match_parent"/> </FrameLayout>
CircleLayerClusteringActivity.java
package com.mapbox.mapboxandroiddemo.examples.dds; import android.graphics.Color;import android.os.Bundle;import android.widget.Toast; import com.mapbox.mapboxandroiddemo.R;import com.mapbox.mapboxsdk.Mapbox;import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;import com.mapbox.mapboxsdk.geometry.LatLng;import com.mapbox.mapboxsdk.maps.MapView;import com.mapbox.mapboxsdk.maps.MapboxMap;import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;import com.mapbox.mapboxsdk.maps.Style;import com.mapbox.mapboxsdk.style.expressions.Expression;import com.mapbox.mapboxsdk.style.layers.CircleLayer;import com.mapbox.mapboxsdk.style.layers.SymbolLayer;import com.mapbox.mapboxsdk.style.sources.GeoJsonOptions;import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;import com.mapbox.mapboxsdk.utils.BitmapUtils; import java.net.URI;import java.net.URISyntaxException; import androidx.annotation.NonNull;import androidx.appcompat.app.AppCompatActivity;import androidx.core.content.ContextCompat;import timber.log.Timber; import static com.mapbox.mapboxsdk.style.expressions.Expression.all;import static com.mapbox.mapboxsdk.style.expressions.Expression.division;import static com.mapbox.mapboxsdk.style.expressions.Expression.exponential;import static com.mapbox.mapboxsdk.style.expressions.Expression.get;import static com.mapbox.mapboxsdk.style.expressions.Expression.gte;import static com.mapbox.mapboxsdk.style.expressions.Expression.has;import static com.mapbox.mapboxsdk.style.expressions.Expression.interpolate;import static com.mapbox.mapboxsdk.style.expressions.Expression.literal;import static com.mapbox.mapboxsdk.style.expressions.Expression.lt;import static com.mapbox.mapboxsdk.style.expressions.Expression.rgb;import static com.mapbox.mapboxsdk.style.expressions.Expression.stop;import static com.mapbox.mapboxsdk.style.expressions.Expression.toNumber;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleColor;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleRadius;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconColor;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconSize;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textAllowOverlap;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textColor;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textField;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textIgnorePlacement;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textSize; /*** Use GeoJSON and circle layers to visualize point data as circle clusters.*/public class CircleLayerClusteringActivity extends AppCompatActivity { private MapView mapView;private MapboxMap mapboxMap; @Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState); // Mapbox access token is configured here. This needs to be called either in your application// object or in the same activity which contains the mapview.Mapbox.getInstance(this, getString(R.string.access_token)); // This contains the MapView in XML and needs to be called after the access token is configured.setContentView(R.layout.activity_circle_layer_clustering); mapView = findViewById(R.id.mapView); mapView.onCreate(savedInstanceState);mapView.getMapAsync(new OnMapReadyCallback() {@Overridepublic void onMapReady(@NonNull MapboxMap map) { mapboxMap = map; map.setStyle(Style.LIGHT, new Style.OnStyleLoaded() {@Overridepublic void onStyleLoaded(@NonNull Style style) {mapboxMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(12.099, -79.045), 3)); addClusteredGeoJsonSource(style);style.addImage("cross-icon-id",BitmapUtils.getBitmapFromDrawable(getResources().getDrawable(R.drawable.ic_cross)),true); Toast.makeText(CircleLayerClusteringActivity.this, R.string.zoom_map_in_and_out_instruction,Toast.LENGTH_SHORT).show();}});}});} @Overridepublic void onStart() {super.onStart();mapView.onStart();} @Overridepublic void onResume() {super.onResume();mapView.onResume();} @Overridepublic void onPause() {super.onPause();mapView.onPause();} @Overridepublic void onStop() {super.onStop();mapView.onStop();} @Overridepublic void onLowMemory() {super.onLowMemory();mapView.onLowMemory();} @Overrideprotected void onDestroy() {super.onDestroy();mapView.onDestroy();} @Overrideprotected void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);mapView.onSaveInstanceState(outState);} private void addClusteredGeoJsonSource(@NonNull Style loadedMapStyle) { // Add a new source from the GeoJSON data and set the 'cluster' option to true.try {loadedMapStyle.addSource(// Point to GeoJSON data. This example visualizes all M1.0+ earthquakes from// 12/22/15 to 1/21/16 as logged by USGS' Earthquake hazards program.new GeoJsonSource("earthquakes",new URI("https://www.mapbox.com/mapbox-gl-js/assets/earthquakes.geojson"),new GeoJsonOptions().withCluster(true).withClusterMaxZoom(14).withClusterRadius(50)));} catch (URISyntaxException uriSyntaxException) {Timber.e("Check the URL %s", uriSyntaxException.getMessage());} //Creating a marker layer for single data pointsSymbolLayer unclustered = new SymbolLayer("unclustered-points", "earthquakes"); unclustered.setProperties(iconImage("cross-icon-id"),iconSize(division(get("mag"), literal(4.0f))),iconColor(interpolate(exponential(1), get("mag"),stop(2.0, rgb(0, 255, 0)),stop(4.5, rgb(0, 0, 255)),stop(7.0, rgb(255, 0, 0)))));unclustered.setFilter(has("mag"));loadedMapStyle.addLayer(unclustered); // Use the earthquakes GeoJSON source to create three layers: One layer for each cluster category.// Each point range gets a different fill color.int[][] layers = new int[][] {new int[] {150, ContextCompat.getColor(this, R.color.mapboxRed)},new int[] {20, ContextCompat.getColor(this, R.color.mapboxGreen)},new int[] {0, ContextCompat.getColor(this, R.color.mapbox_blue)}}; for (int i = 0; i < layers.length; i++) {//Add clusters' circlesCircleLayer circles = new CircleLayer("cluster-" + i, "earthquakes");circles.setProperties(circleColor(layers[i][1]),circleRadius(18f)); Expression pointCount = toNumber(get("point_count")); // Add a filter to the cluster layer that hides the circles based on "point_count"circles.setFilter(i == 0? all(has("point_count"),gte(pointCount, literal(layers[i][0]))) : all(has("point_count"),gte(pointCount, literal(layers[i][0])),lt(pointCount, literal(layers[i - 1][0]))));loadedMapStyle.addLayer(circles);} //Add the count labelsSymbolLayer count = new SymbolLayer("count", "earthquakes");count.setProperties(textField(Expression.toString(get("point_count"))),textSize(12f),textColor(Color.WHITE),textIgnorePlacement(true),textAllowOverlap(true));loadedMapStyle.addLayer(count); }}